Automatic tool-sharpening button-lathe.



r P. F. DUSHA & A. FEYK. AUTOMATlC TOOL SHARPENING BUTTON LATHE.

APPLICATION FILED OCT. 14, I916.

Patented May 8, 1917.

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APPLICATION FILED OCT. 14. l9l6.

Patented May 8, 1917.

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P. F. DUSHA & A. FEYK.

AUTOMATIC TOOL SHARPENING BUTTON LATHE.

APPLICATION FILED OCT. 14. I916- 31 ,2Q5,5g9 Patented May 8, 1917.

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P. F. DUSHA & A. FEYK AUTOMATIC TOOL SHARPENING BUTTON LATHE.

APPLICATION FILED OCT. 14. i9l6. 1,225,599 Patented May 8,1917.

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IPAUL F. DUSHA AND ANTON FEYK. OF NEW YORK, N. Y., ASSIGNORS T0 I-IOLUIB-DUSHA COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

AUTOMATIC TOOL-SHARPENING BUTTON-LATHE.

Specification of Letters Patent.

Patented May 8, 1917.

Application filed October 14, 1916. Serial No. 125,544.

To all whom it may concern Be it known that we, PAUL F. DUSHA and AN 'roN FEYK, citizens of the United States, and residents of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Automatic Tool- Sharpening Button- Lathe, of which the following is a full, clear, and exact description.

This invention relates to pearl button machines and deals particularly with a button cutting lathe having means for automatically sharpening the cutters or tools.

The invention has for its general objects to improve the construction and operation of machines of this character so as to be reli able and cflicient in use, of durable and substantial design and adapted automatically to sharpen one or more of the cutters while another cutter is in use for turning a button.

A more specific object of the invention is the provision of a turret for carrying a plurality of tools in combination with one or more grinding devices so related to the tools that by the movement of the turret to and from the button chuck, one or more of the tools will be automatically sharpened while another tool is employed for cutting a button blank.

Another object of the invention is the provision of automatically adjustable stop devices operating by the step-by-step turning movement of the turret so that the cutters can be ground uniformly to the same extent each time they pass the grinding wheel or wheels.

An additional object of the invention is the provision of a simple, novel and eifective grinding wheel mounting which is adjustable so as to provide any desired bevel on the cutter, the grinding wheel being automatically reciprocated so as to insure uniform wear of the wheel and proper grinding of the cutters.

The invention has as a further object the provision of a plurality of grinding devices cooperatively related with the turret so that the cutters pass the grinding devices successively, the grinding devices being successively of finer quality to produce a sharp edge on the cutters. The grinding devices are so adjustable that one or more may be employed at a time, as conditions require.

An additional object is the employment of a novel means for clamping and unclamping the turret to its base plate and for simultaneously actuating a locking pin that holds the turret with the cutters in proper alinement with the button chuck and grinding devices.

Further objects of the invention are the provision of a novel tool rest on the turning head of the lathe and novel track bars on which the turret and one of the grinding devices are mounted.

With such objects in view, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particu larity in the following description and claims appended hereto.

In the accompanying drawings, which illustrate one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views,

Figure 1 is a side view of the lathe;

Fig. 2 is a plan view thereof;

Fig. 3 is a transverse section of the lathe in a plane coincident with the center of the turret but showing the same in elevation;

Fig. 4c is a transverse section on the line l-4, Fig. 2;

Fig. 5 is a detail section through the center of the turret on the line 55, Fig. 7 with the upper portion in elevation;

Fig. 6 is a longitudinal sectional view through the bottom portion of the turret on the line 66, Fig. 7;

Figs. 7 and 8 are horizontal sections on the lines 7 -7 and 88, respectively, Fig. 6;

Fig. 9 is a detail sectional View on the line 9--9, Fig. 3; and

Fig. 10 is a sectional view on the line 10 10, Fig. 6.

Referring to the drawing, A designates the frame of the lathe on the bed 1. of which is carried a turning head 13, the tool turret C and the grinding devices D and E. The head is of usual construction and includes a spindle 2 which carries a button-holding chuck 3, the spindle being driven in any suitable manner, as, for instance, -by a stepped pulley 4. On the frame 5 of the turning head is a tool rest 6 in the form of a bar having one end bent into a stud 7 which enters an apertured boss 8 on the side of the frame 5. By mounting the tool rest in this manner it can be swung to and from coeperative position; with respect to the chuck or spindle as the stud 7 serves as a pivot. Such tool rest forms a handy auxiliary for a lathe, and the rest can be readily removed by being lifted out of the boss 8.

In the top surface of the bed 1 are parallel V-shaped grooves 9, as clearly shown in Fig. at, and in these grooves are set track bars 10 of square cross-section, the lower half of each bar being seated in its respective groove 9, and the upper half projecting above the surface of the bed to form a track rail. These track bars are secured in place in any suitable manner, as, for instance, by screws 11 which pass upwardly through the bed, as shown in Fig. 3, and screwed into the bars. When these bars become worn they can be removed and new ones substituted, thus doing away with the scrapping of the whole bed 1..

The turret C comprises a base plate or slide 12 which has V-shaped grooves 13 to engage the tracks 10, and the base plate is s-lidably held in place on the bed by plates 14,.Fig. 5, which engage under theflanges 15 of the bed. The rotatable body 16 of the turret rests on the annular race 17 of the base plate 12 and is held in place by a bolt 18 which has the threaded portion 19 screwed into a bearing piece 20 within the chamber 21 of the base plate, there being a head 22 on the upper end of the belt which engages a shoulder 23 on the body 16 of the turret. The lower end of the screw or bolt 18 is provided with a lever 2% whereby the bolt can-be turned so as to move upwardly or downwardly to clamp or unclamp the rotatable body 16 by the head 22 engaging and disengaging the shoulder 23. The body of the-tool is provided with suitable holders forthe cutters 25, but as these holders form no part of the present invention it is unnecessary to describe them, it suflicing to say that in the present instance, as shown in Fig. 2, there are four tool or cutter holders on the turret.

In. order to lock the turret in position with a cutter 25in register with the button chuck 3, a registering pin 26 is arranged in the base plate 12 to engage in any one of four sockets 27 in the bottom of the rotatable body of the turret. The pin 26 is slidable in a vertical socket 28 and is urged upwardly by a spring 29. The pin has a shank 30011 the lower end of which is a horizontal arm 31 provided with a beveled surface 32. This arm 31 is adapted to be engaged by an arm 33 on the clamping bolt 18, the arm 33 having a cam surface 34 which is adapted to contact with the bevel surface 32 and cause the locking pin 26 to be moved downwardly and disengage the body of the turret. When the arm 24: is moved to the left, Fig. 5, the bolt 18 is turned so as to unclamp the body of the turret, and finally the arm 33 engages the arm 32 and releases the locking pin 26. The operator now takes hold of a suitable partof the turret body and turns the same to bring a sharpened cutter into proper relation with the button chuck. After this adjustment is effected the lever 24: is turned back to its normal position so that the turret body will be clamped and locked. The turret as a whole slides on the track bars 10 so as to move the appropriate cutter into and out of engagement with the blank in the chuck 3. This movement is effected by an operating lever 35 which is pivotally connected at 36 with the base plate 12 of the turret, the rear end of the lever being fulcrumed at 37 on a link 38 which is pivoted to the bed at 39, Fig. 2.

A grinding device D comprises a wheel iO fastened to a horizontal shaft 41 which is journaled in bearings i2'on a frame 43, and on one end of the shaft is a pulley 44 whereby' it can be driven by a belt. The frame 13 is formed with a vertical plate 45 which is slidable in a vertical guideway 46 of an L shaped bracket 47 that is clamped to abase plate orslide 48 which rests on the track bars 10 at the end of the bed opposite from the turning head B. An adjusting screw 49 rotatable in a bearing 50 on the bracket 16 and suitably connected with the plate 45 enables the grinding wheel to be raised or lowcred with respect to the cutters on the turret. The base plate 18 is adjustable horizontally on the bed by means of a screw 51 journaled in a bracket 52 on the bed and having threaded connection at 53 with the base plate 41-8. By this means the grinding wheel can be shifted horizontally toward or from the turret. The bolts 54: which clamp the bracket 46 to the base plate 48 pass through arcuate slots 55, so that the bracket can be adjusted to throw the plane of rotation of the grinding wheel 10 to any de sired angular relation with respect to the cutter 25, whereby the cutters can be ground with a transverse bevel, according to the nature of the face of the button to be cut. Carried by the grinding wheel supporting frame 43 is a trough 56 for holding water in which the wheel runs. The final grinding device E is carried by a rear extension 57 of the body 1, and this device E comprises a wheel 58 fastened to an axle or shaft 59 which is journaled in bearings 60 on a vertical plate 61. This plate is slidable in a guideway 62 on a post'63 which rises from the base plate or slide (34. The plate 61 is adjusted vertically by means of a screw 65 similar to the screw 49. The wheel 58 is urged toward the turret by a spring 66 which has one end bearing against theshoulder 67 on the base plate 64 and the other end bearing against an abutment 68 on the bed extension 57, and this spring maintains the inner face 69 of the plate 64 against an adjustable stop 70 which moves automatically with each step or rotation of the turret a suitable distance to compensate for the grinding away of the cutters.

By reference to Fig. 2 it will be observed that the grinding device D is located at the side of the turret opposite from the turning head so that while one cutter is in position to operate on the button blanks, the diametrically opposite cutter can be ground by the wheel 40. The grinding device E is arranged with its wheel, 58 at right angles to and ninety degrees from the grinding wheel 40 so that as the turret is moved back and forth the rearwardly extending cutter, Fig. 2 will pass over the face of the grinding wheel 58. The grinding wheel 10 is coarser than the grinding wheel 58, so that the cutter is finished by the latter wheel. The front or dull cutter is not operated on until the turret body is turned through ninety degrees in an anti-clockwise direction, Fig. 2, and the finished cutter is then moved from the wheel 58 to position in alinement with the chuck 3.

The back and forth movement of the turret is gaged so that the right cutter, Fig. 2, will be in proper relation with the grinding wheel 40. For this purpose an adjustable stop 71 extends out of the right end of the base of the turret and is adapted to engage a fixed abutment 72 on the base plate -18 of the grinding device D. This adjustable stop is a screw which is threaded in a fixed nut 73 mounted in the base plate 12, and this screw is given a partial turn with each step or rotation of the turret body 16. On the screw: 71, as shown in Fig. 6, is a worm wheel 74 to which the screw is feathered, and meshing with the worm wheel is a worm 7 5 suitably ournaled in the turret, as shown in Fig. 5, and on this worm is a ratchet wheel 7 6 engaged by a spring-actuated pawl 77 to control the direction of rotation of the ratchet wheel. The bottom of the turret body is provided with a series of holes 78 into any one or more of which can be placed pins 79 for engagement with the ratchet wheel to partially turn the same as the turret body is turned. By this means the screw stop 71 can be intermittently moved inwardly with the turning of the turret so as to allow the turret to move to a greater distance to the right and bring the cutter 25 into engagement with the grinding wheel 10, this increasing range of return movement of the turret serving to compensate for grinding away of the cutters.

As the cutters grind away it is necessary that the turret have an increased range of movement to the left, Fig. 1, so that the cutters will be maintained in proper relation to the button chuck 3. For this purpose an adjustable stop screw 71 extends out of the left end of the base plate 12 and is adapted to engage an abutment 7 2 on the frame 5 of the turning head B. The inner ends of the screws 71, 71 which are in alinement, are keyed together so that the worm gearing will drive both screws simultaneously, this keying together of the screw stops being effected by one having a tongue 80 engaging in a mortise 81 in the other, as shown in Fig. 7. The screw stop 70 is connected with a screw stop 71 by bevel gears 82, Fig. 7, the screw stops being feathered in the gears so as to provide for the longitudinal movement of the screw stops. The screw stops are shown in Fig. 7 as being almost completely indrawn to their limit. To restore the stops to their initial position the respec tive nuts of the stops are manually turned separately. Normally the nuts are prevented from turning by any suitable means, such as shown in F ig. 1.0. It will be noted that the nut has flat sides 83 with which a keeper s4 is engaged. This keeper can be detached and then the nut can be freely turned for the purpose mentioned.

The grinding device I) when set with its wheel at an angle to the length of the adjacent cutter so as to bevel the latter transversely, is used alone or without the cutting device E, the latter being moved to a position out of the path of the cutters 25. To 7 accomplish this the wheel 58 can be screwed downwardly by manipulating the screw so that it cannot come into contact with the cutters, as shown in Fig. 3.

The grinding wheel 40 has a lateral reciprocatory motion while it rotates, so as to insure uniform grinding of the cutters and uniform wearing away of the wheel, thereby preventing grooves developing in the latter. For this purpose, as shown in Fig. 1, a cam wheel 85 is mounted under the shaft 41, and on this cam wheel is a large gear 86 which meshes with a pinion 87 on the shaft 11, there being shoulders 88 in the shaft 4C1 between which the periphery of the gear 86 engages. A fixed pin or roller 89 extends into the cam groove 90 of the cam 85, so that as the latter rotates through the pinion 87 and gear 86, the cam will have an axial rcciprocatory motion. This reciprocatory motion is transmitted to the shaft 41 and grinding wheel 40 by reason of the gear 86 engaging between the shoulders 88 of the shaft 4-1.

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while we have described the principle of operation, together with the machine which we now consider to be the best embodiment thereof, we desire to have it understood that the machine shown is merely illustrative and that such changes may be made when desired as fall within the scope of the appended claims.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. A machine of the class described comprising a turning head, a slidable tool turret movable toward and from the head, a grinding device associated with the turret and with which a tool is engaged and disengaged while another tool in the turret moves into and out of cooperative relation with the turning head, and automatically adjustable stop means for increasing the range of movement of the turret in the same proportion as the tools grind away.

2. A machine of the class described comprising a turning head, a tool turret carrying a plurality of tools and rotatable to bring the tools successively into cooperative relation with the turning head, means for moving the turret toward and from the turning head, and a plurality of grinding devices of different grinding power for automatically grinding a plurality of tools upon the back and forth movement of the turret and past which each tool travels.

3. A machine of the class described comprising a turning head, a tool turret carrying a plurality of tools and rotatable to bring the tools successively into cooperative relation with the turning head, means for moving the turret toward and from the turning head, a plurality of grinding devices tor automatically grinding a plurality of tools upon the back and forth movement of the turret, and automatically adjustable stop means for maintaining the tools in proper relation to the turning head and grinding devices as the tools grind away.

a. A machine of the class described comprising a turning head, a tool turret movable toward and from the head, a grinding wheel arranged in cooperative relation with the turret to grind one tool while the other is in service, means for laterally reciprocating the grinding wheel with respect to the tool being ground, stop devices for limiting the movement of the turret, and means for adjusting the stop devices by the turning of the turret to vary the range of movement of the turret for compensating for the grinding away of the tools.

5. A machine of the class described comprising a turning head, a tool turret movable toward and from the head, a grinding device associated with the turret and arranged to 'grind one tool while another tool is in service relation to the head, alining stops on the turret arranged to engage the head and grinding device for limiting the movement of the turret in each direction, a slip joint between the inner ends of the stops for permitting the same to move apart while locked together for simultaneous rosively grind the tools as the turret body turns, and means for automatically increasing the range of movement of the turret as the tools grind away.

7. Ina machine of the class described,

the combination of a turning head, a slidable turret movable toward and from the head and having a rotatable tool-carrying body, a grinding device arranged to suecessively grind the tools as the turret body turns, means for automatically increasing the range of movement of the turret as the tools grind away, said means comprising adjustablestops on the turret, thread means for moving the stops progressively inwardly, a worm gearing carried by the turret and transmit-ting motion from the rotatable body of the turret to the stops for turning the same, and adjustable ratchet means operating through the worm gearing, whereby the turning of the turret body operates the gearing.

8. A machine of the class described comprising a tool turret, in combination with a grinding device for successively sharpening the tools as the turret is turned, said device comprising a grinding wheel, and a structure adjustable rectilinearly in two directions at rightangles.to each other and adjustable angularly for properly positioning the grinding wheel with respect to the tools.

9. A machine of the class described comprising a tool turret, in combination with a grinding device for successively sharpening the tools as the turret is turned, said device comprising a grinding wheel, a structure adjust-able rectilinearly in two directions at right-angles to each other and adjustable angularly for properly positioning the grinding wheel with respect to the tools, and means for laterally reciprocating the grinding wheel as the same rotates.

10. A machine of the class described including a tool turret movable back and forth and having a rotatable tool-carrying body, and a plurality of grinding wheels, one being arranged with its plane parallel to the line of movement of the turret and the other with its plane at right-angles to such line of movement, whereby two tools are ground simultaneously.

11. A machine of the class described including a reciprocatory turret having a rotatable tool-carrying body, a turning head, a grinding wheel disposed at the side of the turret opposite from the turning head, whereby the movement of the turret in one direction brings one cutter into cooperative relation with the turning head while movement in the other direction brings the opposite cutter into grinding relation with the said wheel, and a second grinding wheel arranged with its plane at right-angles to the line of movement of the turret, whereby a tool ground on the first wheel can be finished on the second wheel by the reciprocation of the turret.

12. A machine of the class described including a reciprocatory turret having a rotatable tool-carrying body, a turning head, a grinding wheel disposed at the side of the turret opposite from the turning head, whereby the movement of the turret in one direction brings one cutter into cooperative relation with the turning head while movement in the other direction brings the opposite cutter into grinding relation with the said wheel, a second grinding wheel arranged with its plane at right-angles to the line of movement of the turret, whereby a tool ground on the first wheel can be finished on the second wheel by the reciprocation of the turret, means urging the second wheel toward the turret, a stop for limiting the movement of the second wheel toward the turret, and means for adjusting the stop to compensate for the wearing away of the tools.

13. A machine of the class described including a reciprocatory turret having a rotatable tool-carrying body, a turning head, a grinding wheel disposed at the side of the turret opposite from the turning head, whereby the movement of the turret in one direction brings one cutter into cooperative relation with the turning head while movement in the other direction brings the opposite cutter into grinding relation with the said wheel, a second grinding wheel arranged with its plane at right-angles to the line of movement of the turret, whereby a tool ground on the first wheel can be finished on the second wheel by the reciprocation of the turret, means urging the second wheel toward the turret, a stop for limiting the movement of the second wheel toward the turret, means for adjusting the stop to compensate for the wearing away of the tools, and automatically adjustable stops for limiting the range of movement of the turret to compensate for the cutting away of the tools.

14:. A machine of the class described including a reciprocatory turret having a rotatable tool-carrying body, a turning head, a grinding wheel disposed at the side of the turret opposite from the turning head, whereby the movement of the turret in one direction brings one cutter into cooperative relation with the turning head while move ment in the other direction brings the opposite cutter into grinding relation with the said wheel, a second grinding wheel arranged with its plane at right-angles to the line of movement of the turret, whereby a tool ground on the first wheel can be finished on the second wheel by the reciprocation of the turret, means urging the second wheel toward the turret, a stop for limiting the movement of the second wheel toward the turret, means for adjusting the stop to compensate 'for the wearing away of the tools, automatically adjustable stops for limiting the range of movement of the turret to compensate for the cutting away of the tools, and means actuated by the turn-- ing of the turret for operating all of the said stops simultaneously and to the same degree.

15. A machine of the class described comprising a turning head, a turret movable toward and from the head and having a rotatable tool-carrying body, a tool grinding wheel mounted to rotate in a plane transverse to the line of movement of the turret, means for urging the grinding wheel toward the turret, a screw stop on the non-rotatable part of the turret for limiting the movement of the grinding wheel toward the turret, and mechanism between the screw stop and the rotatable part of the turret for progressively moving the stop to maintain the proper relation of the grinding wheel to the tools.

PAUL F. DUSI-IA. ANTON FEYK.

topics of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

